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← TechnologyWhich outcome occurs when a high-voltage DC transmission circuit experiences ground fault?
A)Commutation failure damages converters
B)Arc flash initiates cascading failures
C)Over-voltage stresses insulation breakdown✓
D)Resonant oscillations induce harmonic distortion
💡 Explanation
When a ground fault occurs, the DC voltage rapidly rises seeking a path to ground, subjecting the circuit's insulation to extreme over-voltage because of the increased potential difference. Therefore, insulation breakdown results, rather than converter damage, arc flash propagation, or harmonic distortion each having distinct causes.
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